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A carton of 18 rechargeable batteries contains three that batteries and get exactly one defective battery? re defective. In how many ways can an inspector choose 4 of the
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SUMMARY: A carton of 18 rechargeable batteries contains three that batteries and get exactly one defective battery.

We supposed find the number of ways that can an inspector choose 3 of the batteries and get the 4 that is defective.

Here order doesn't matter so, we have to use combinations.

ven Hp*e non - do defeclive balooies tee woys and one one deletive Can Selecdt in () . we hove, 3 Is 1 1S s us woys that an an inspecbr chose. u of the boteies and get the ene three thot- is defechve

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